STORAGE DEVICE

摘要

A storage subsystem according to one preferred embodiment of the present invention comprises multiple storage devices, and a controller for executing an I/O processing to the storage device by receiving an I/O request from a host computer. The controller has an index for managing a representative value of the respective data stored in the storage devices. When a write data is received from the host computer, a representative value of the write data is calculated, and the index is searched to check whether a representative value equal to the representative value of the write data is stored or not. When a representative value equal to the representative value of the write data is stored in the index, the write data and the data corresponding to the same representative value are stored in the same storage device.

主权项

1. A storage subsystem comprising multiple storage devices, and a controller for executing an I/O processing to the storage device by receiving an I/O request from a host computer, the controller having an index for managing a representative value of the respective data stored in the storage devices; wherein
when the controller receives a write data from the host computer, the controller: calculates a representative value of the write data using the write data; and when a same representative value as the representative value of the write data is stored in the index, determines to store the write data and the data corresponding to the same representative value in the same said storage device.